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Method for operating a metallurgical furnace

A technology for metallurgical furnaces and blast furnaces, applied in the field of operating metallurgical furnaces, can solve problems such as fuel consumption and increased reforming process complexity.

Active Publication Date: 2021-12-21
PAUL WURTH SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heating adds to the complexity of the reforming process and also requires consumption of fuel for burners etc., undoing partly the CO achieved by overhead gas recirculation 2 reduce

Method used

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  • Method for operating a metallurgical furnace
  • Method for operating a metallurgical furnace

Examples

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Embodiment Construction

[0026] figure 1 A blast furnace plant 1 comprising a blast furnace 10 is schematically shown. At the top end of the blast furnace 10 , the blast furnace 10 typically receives coke 12 and ore 13 from a bunker 15 . At the bottom end of the blast furnace 10 pig iron and slag are extracted (not shown for simplicity). The operation of the blast furnace 10 itself is well known and will not be further described herein. At the top end blast furnace gases 14 are recovered from the blast furnace 10 . The recovered blast furnace gas 14 may be processed in a gas cleaning facility 20 primarily for the removal of particulate matter from the blast furnace gas 14 and may condense a portion of the vapors contained in the blast furnace gas 14 , the recovered blast furnace gas 14 For example may have a concentration of N below 40% 2 , about 25% to 40% concentration of CO and CO 2 and about 5% to 15% H 2 . The recovered and cleaned blast furnace gas 14 may be used for various purposes not ...

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Abstract

The invention relates to a method for operating a metallurgical furnace (10). In order to provide a simplified way of providing synthesis gas for a metallurgical furnace, the invention provides that the method comprises: - performing a combustion process outside the metallurgical furnace (10) by combusting a carbon-containing material (41) with an oxygen-rich gas (40) to produce an offgas (42), which offgas (42) is a CO2 containing gas; - combining the offgas (42), while having an elevated combustion-induced temperature due to the combustion process, with a hydrocarbon-containing fuel gas (43) to obtain a first gas mixture (44) having a temperature above a reforming temperature necessary for a reforming process, preferably a dry reforming process; - the first gas mixture (44) undergoing the reforming process, thereby producing a synthesis gas (45) containing CO and H2, the reforming process being performed non-catalytically; and - feeding the synthesis gas (45) into the metallurgical furnace (10).

Description

technical field [0001] The invention relates to a method for operating a metallurgical furnace. Background technique [0002] Despite alternative methods such as scrap melting or direct reduction in electric arc furnaces, the blast furnace today still represents the most widely used method for steel production. One of the points of interest of the blast furnace facility is the blast furnace gas exhausted from the blast furnace. Since the gas exits the blast furnace at the top of the blast furnace, this gas is also commonly referred to as "top gas". While in the early days this blast furnace gas was allowed to be vented directly into the atmosphere, this has long been considered a waste of resources and an undue burden on the environment. One component of the blast furnace gas is CO 2 , CO 2 are environmentally harmful and mostly useless for industrial applications. In fact, blast furnace gases exiting blast furnaces often include concentrations as high as 20% to 30% CO ...

Claims

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Application Information

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IPC IPC(8): C21B5/06C21B13/00
CPCC21B5/06C21B2100/22C21B2100/26C21B13/0073Y02P10/122C21B11/02
Inventor 克里斯蒂亚诺·卡斯塔尼奥拉洛伦佐·米切列蒂
Owner PAUL WURTH SA